Panax trifolius L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Androdioecious; root globose; stem 1–2 dm; lfls 3–5, sessile or nearly so, lanceolate to elliptic or oblanceolate, 4–8 cm, obtuse or subacute, finely serrate; peduncle 2–8 cm; fls white or tinged with pink, often unisexual; styles usually 3; fr yellow, 5 mm thick; 2n=24. Rich woods and bottomlands; Que. and N.S. to Minn., s. to Pa., Ind., and Io., and along the mts. to Ga. Apr., May.